我正在使用node.js
表达式框架,并且最初在一个路由文件中编写了获取数据库密码/哈希并比较表单密码/哈希。现在我想将userName
传递给一个单独的模块。模块应接受userName
并从数据库返回相应的密码/哈希。
在将函数分解为自己的模块之前,我们返回散列并将其传递给下一个函数(passHash
),代码工作正常。现在我已经将函数与db调用分开,我无法弄清楚如何将散列返回到原始函数。
将函数分解为两个单独的文件,我可以成功将userName
传递给数据库模块(控制台记录username
/ hash
),但我无法返回用户& #39; s密码/ hash返回原路由中的原始函数。我已经阅读了很多关于如何使用require
来传递" OR"将变量/对象从一个模块返回到另一个模块,但没有关于如何传递变量" AND"返回帖子功能数据。
以下是我在创建这些文件时参考的一些资源
1。)Accepted answer was easy to follow (this is the model I used)
2。)Advanced
3。)Example most answers show one way return functions
此外,我已尝试在几个安排中返回密码/哈希;创建一个对象并返回属性。返回对象,并将对象分配给变量并提取类似于链接4 Above的属性。
以下是:
1。)模块化数据库功能(databaseLoginUser.js
)
2。)调用模块化函数(databaseLogin.js
)
3.。)控制台输出(没有错误只是挂起等待下一个功能)
//databaseLoginUser.js
var express = require('express');
var router = express.Router();
var mysql = require('mysql');
module.exports.getModuleFunction = function(userName, callback) {
queryUser(userName);
function queryUser(userName) {
console.log('In Query User; ');
var database = mysql.createConnection({
host: "xxx.xxx.xxx.xxx",
port: "3306",
user: "UserName",
password: "Password",
database: "Students",
multipleStatements: true
});
database.connect();
console.log('test');
database.query('SELECT StudentUsername, StudentPassword FROM STUDENT WHERE StudentUsername = ?', userName, function(err, rows, fields) {
if (err) {
console.log(err);
}
//console.log(rows);
console.log('Database Returned User: ' + rows[0].StudentUsername);
console.log('Database Returned Password: ' + rows[0].StudentPassword);
var hashFromDatabaseBuffer = Buffer.from(rows[0].StudentPassword);
returnPassHash(hashFromDatabaseBuffer);
return returnPassHash;
})
function returnPassHash(hashFromDatabaseBuffer) {
console.log('Do I get here?; ');
return hashFromDatabaseBuffer;
}
}
};

queryPass
是调用并返回其他模块的密码属性的函数,我已经用几种不同的方式编写了这个函数,但为了简洁,我决定发布这个版本的函数调用。
//loginUser.js
var express = require('express');
var router = express.Router();
var mysql = require('mysql');
var bodyParser = require('body-parser');
var async = require('async');
var app = express();
var expressValidator = require('express-validator');
var securePassword = require('secure-password');
var database = require('./db');
var queryPass = require('./databaseLoginUser');
router.get('/', function(req, res, next) {
'use strict';
console.log('in the login user get route');
res.render('signUp');
});
router.post('/', function(req, res, next) {
'use strict';
console.log('in Login Route');
var userName = req.body.userName;
var preHashPass = req.body.password;
queryPass.getModuleFunction(userName, function(data) {
passHash('', '', data)
});
function passHash(userName, preHashPass, hashFromDatabaseBuffer) {
// Initialise our password policy
var pwd = securePassword()
var postPassHash = Buffer.from(preHashPass);
// Register user
pwd.hash(postPassHash, function(err, hash) {
if (err) throw err
// Save hash somewhere
console.log('Form Password Hashed:');
console.log(hash);
pwd.verify(postPassHash, hashFromDatabaseBuffer, function(err, result) {
console.log('Verify Result: ');
console.log(result);
if (err) throw err
if (result === securePassword.INVALID) {
return res.render('index');
return console.log('Imma call the cops')
res.render('index');
} else {
if (result === securePassword.INVALID_UNRECOGNIZED_HASH) return console.error('This hash was not made with secure-password. Attempt legacy algorithm')
if (result === securePassword.VALID) console.log('Yay you made it')
if (result === securePassword.VALID_NEEDS_REHASH) {
console.log('Yay you made it, wait for us to improve your safety')
pwd.hash(hashFromDatabase, function(err, improvedHash) {
if (err) console.error('You are authenticated, but we could not improve your safety this time around')
// Save improvedHash somewhere
hash = improvedHash;
})
}
var verifiedHash = hash;
console.log('verifiedHash: ');
console.log(verifiedHash);
//Give User Auth Token Here
console.log('You Get an auth Token: ');
res.render('studentDash');
}
}) // pwd.verify
});
pwd.hash
}; // pass hash
})
module.exports = router;

服务器的控制台输出 (注意密码是虚拟数据)
控制台输出
[nodemon] starting node ./bin/www
GET /LogoWithLayersTiny.png 304 1.124 ms - -
in Login Route
In Query User;
test
Database Returned User: bb
Database Returned Password: "HashParametersRemoved"$WItArkxi20QeSHlGhUK2lQ$PY74Axv6cOvFDFiHmZ6EwT0RMgLkDOb1W6CVBssE1tk
Do I get here?
答案 0 :(得分:1)
我认为您只需要在dataLoginUser.js中调用callback
传递数据。
像这样:
// databaseLoginUser.js
var express = require('express');
var router = express.Router();
var mysql = require('mysql');
module.exports.getModuleFunction = function (userName, callback) {
queryUser(userName);
function queryUser(userName) {
console.log('In Query User; ');
var database = mysql.createConnection({
host: "xxx.xxx.xxx.xxx",
port: "3306",
user: "UserName",
password: "Password",
database: "Students",
multipleStatements: true
});
database.connect();
database.query('SELECT StudentUsername, StudentPassword FROM STUDENT WHERE StudentUsername = ?', userName, function (err, rows, fields) {
if (err) { console.log(err); }
console.log('Database Returned User: ' + rows[0].StudentUsername);
console.log('Database Returned Password: ' + rows[0].StudentPassword);
var hashFromDatabaseBuffer = Buffer.from(rows[0].StudentPassword);
callback(hashFromDatabaseBuffer); // This call.
});
}
};